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I finally got the engine running the other day. It ran fine but one of the small valve covers was leaking. I fixed that then tried it a few days later. It seems to only run with the choke on. If I shut it off at all it stops immediatley.
The engine is a 18HP B&S twin cylinder.
he engine is almost new but had some nternal problems. What shoud I check first?

I took off the top of the carb, there was plenty of fuel and it looked clean (needle valve not sticking).
 

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kaw550
It sounds like the carb is running lean. It may need an adjustment on the high speed screw but without the model and type number I can't look at the parts drawings to see what type of carb you have. Maybe give me the model, type and serial number so I can check further.

snoman
 
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